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diff --git a/rts/gmp/mpn/sparc32/addmul_1.asm b/rts/gmp/mpn/sparc32/addmul_1.asm
new file mode 100644
index 0000000..80c94e4
--- /dev/null
+++ b/rts/gmp/mpn/sparc32/addmul_1.asm
@@ -0,0 +1,146 @@
+dnl  SPARC mpn_addmul_1 -- Multiply a limb vector with a limb and add the
+dnl  result to a second limb vector.
+
+dnl  Copyright (C) 1992, 1993, 1994, 2000 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of the GNU Lesser General Public License as published
+dnl  by the Free Software Foundation; either version 2.1 of the License, or (at
+dnl  your option) any later version.
+
+dnl  The GNU MP Library is distributed in the hope that it will be useful, but
+dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+dnl  License for more details.
+
+dnl  You should have received a copy of the GNU Lesser General Public License
+dnl  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+dnl  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+dnl  MA 02111-1307, USA.
+
+
+include(`../config.m4')
+
+C INPUT PARAMETERS
+C res_ptr	o0
+C s1_ptr	o1
+C size		o2
+C s2_limb	o3
+
+ASM_START()
+PROLOGUE(mpn_addmul_1)
+	C Make S1_PTR and RES_PTR point at the end of their blocks
+	C and put (- 4 x SIZE) in index/loop counter.
+	sll	%o2,2,%o2
+	add	%o0,%o2,%o4	C RES_PTR in o4 since o0 is retval
+	add	%o1,%o2,%o1
+	sub	%g0,%o2,%o2
+
+	cmp	%o3,0xfff
+	bgu	L(large)
+	nop
+
+	ld	[%o1+%o2],%o5
+	mov	0,%o0
+	b	L(0)
+	 add	%o4,-4,%o4
+L(loop0):
+	addcc	%o5,%g1,%g1
+	ld	[%o1+%o2],%o5
+	addx	%o0,%g0,%o0
+	st	%g1,[%o4+%o2]
+L(0):	wr	%g0,%o3,%y
+	sra	%o5,31,%g2
+	and	%o3,%g2,%g2
+	andcc	%g1,0,%g1
+	mulscc	%g1,%o5,%g1
+ 	mulscc	%g1,%o5,%g1
+ 	mulscc	%g1,%o5,%g1
+ 	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,%o5,%g1
+	mulscc	%g1,0,%g1
+	sra	%g1,20,%g4
+	sll	%g1,12,%g1
+ 	rd	%y,%g3
+	srl	%g3,20,%g3
+	or	%g1,%g3,%g1
+
+	addcc	%g1,%o0,%g1
+	addx	%g2,%g4,%o0	C add sign-compensation and cy to hi limb
+	addcc	%o2,4,%o2	C loop counter
+	bne	L(loop0)
+	 ld	[%o4+%o2],%o5
+
+	addcc	%o5,%g1,%g1
+	addx	%o0,%g0,%o0
+	retl
+	st	%g1,[%o4+%o2]
+
+L(large):
+	ld	[%o1+%o2],%o5
+	mov	0,%o0
+	sra	%o3,31,%g4	C g4 = mask of ones iff S2_LIMB < 0
+	b	L(1)
+	 add	%o4,-4,%o4
+L(loop):
+	addcc	%o5,%g3,%g3
+	ld	[%o1+%o2],%o5
+	addx	%o0,%g0,%o0
+	st	%g3,[%o4+%o2]
+L(1):	wr	%g0,%o5,%y
+	and	%o5,%g4,%g2
+	andcc	%g0,%g0,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%o3,%g1
+	mulscc	%g1,%g0,%g1
+	rd	%y,%g3
+	addcc	%g3,%o0,%g3
+	addx	%g2,%g1,%o0
+	addcc	%o2,4,%o2
+	bne	L(loop)
+	 ld	[%o4+%o2],%o5
+
+	addcc	%o5,%g3,%g3
+	addx	%o0,%g0,%o0
+	retl
+	st	%g3,[%o4+%o2]
+EPILOGUE(mpn_addmul_1)